50mm Diameter Zoom Stere Microscopes Adjustable Focusing Bracket Focusing Holder For Tinocular Microscope Binocular Microscope.

SPECIFICATIONS:

• Brand new focus rack with ball bearing

• Focus gear with coarse focus and tension adjustment

• Diameter of annular ring holding microscope head:  (50mm)

• Diameter of opening for stand post (arbor): 1-1/4" (25mm)